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Finding the Fourth Proportional to 418,649.79, 577,751.94 and 239,836.35

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Solution

The fourth proportional to 418,649.79, 577,751.94 and 239,836.35 is: 330,982.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,649.79 : 577,751.94 = 239,836.35 : x
  2. Step 2: Convert to fraction form
    418,649.79/577,751.94 = 239,836.35/x
  3. Step 3: Cross multiply
    418,649.79x = 577,751.94 × 239,836.35
  4. Step 4: Simplify right side
    418,649.79x = 138,565,916,495.02
  5. Step 5: Solve for x
    x = 138,565,916,495.02/418,649.79
  6. Step 6: Final answer
    x = 330,982.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.